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Free Online Tools For Developers

Check out some of the Tools:
Generators
Credit Card
Generate fictitious credit card numbers completely randomly for software testing purposes, besides also being able to validate a specific card number.
CPF (Brazil)
Generate fictitious CPF numbers, but valid for software testing purposes. Also use this tool to validate CPF numbers according to its algorithm.
CNPJ (Brazil)
Generate fictitious CNPJ numbers, but valid for software testing purposes. Also use this tool to validate CNPJ numbers according to its algorithm.
QR Code - Logo
QR Codes are a great marketing and communication tool. Be sure to put a Qr Code on your business cards or pamphlets so that your customers can easily access your website, profile page or portfolio.
Barcode
This tool allows you to generate barcodes very quickly and easily. Download the generated barcode image for label printing. This tool supports several formats.